In addition to the prison sentence, Martin is required to register as a sex offender and was sentenced to mandatory probation for three years to life.

Prosecutors say Martin sexually assaulted and fondled the girl and took nude photographs of her. The girl was 13 years old at the time of Martin’s December 2012 arrest.

When confronted by the child’s mother, Martin admitted to abusing the girl and made similar admissions to a friend, Assistant State’s Attorney Sharyl Eisenstein said.

Police at the time said the abuse had been going on for a year and a half.

Martin initially was charged with predatory criminal sexual assault of a child and two counts of aggravated criminal sexual abuse, but those were dropped in exchange for his guilty plea to the lesser charges.

Criminal sexual abuse is a Class 1 felony and carries a sentencing range between four and 15 years.